Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f93063a736b8f3…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 03:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 65a8361956c9b1a94638daeca81341d6 SHA-1: 6fef4619b3a7eced9709637196d23b7fbd724b6e SHA-256: 36f93063a736b8f31a55445e94d8ba7d4e9d8bb676be4adb11722e39cea4522b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3mr4ir78afvs8gbrneggb5j746/fixugoputoguz.pdf In PDF document text
    • http://abwingsde.com/uploads/files/wobeguxipufepejigavugipen.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/56497891889.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/76372893888.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/35252486025.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/84201570170.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/4703078467.pdfIn PDF document text
    • http://insightonafrica.in/userfiles/file/redemudojowafigidu.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/43226418501.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/jasarudasifekatejowo.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161386cedf3a3a---46733605130.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/vimoxekiwarubitupage.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613860a9f17d3---21256580688.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/pabojuwimoxij.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/31274078674.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/77214839184.pdfIn PDF document text
    • http://megatex-plast.ru/pub/file/lujalaleriledesopi.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/45151794438.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/34640552614.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/jejupi.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/paludodizef.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/861f9fe6810dcdc228b37f4d0b5e26f4/79916354263.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/vavom.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136d38a95c55---lodotoroge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=getting+over+it+apk+crackPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 21584 bytes
SHA-256: 66b6c632b673e8c48c9c16c98c3f43fc08423b9a8ce5860349ebffd1edcd8d2e
font_01_sfnt_off00010c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001246f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246F 10532 bytes
SHA-256: 26a22201bdda2a458c0754d4590ffc5fef63c95abacb03c189ea075ed110dd1d